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Harmony Blockchain Data Indexing API

Harmony Quick Facts

Harmony is an open and fast blockchain. The production mainnet supports 4 shards of 1000 nodes, capable of running Ethereum applications with 2-second transaction finality, and 1000 times lower fees than Ethereum. Harmony is your open platform for assets, collectibles, identity, governance. The secure bridges offer cross-chain asset transfers with Ethereum, Binance and 3 other chains. Harmony’s Effective Proof-of-Stake (EPoS) reduces centralization while supporting stake delegation, reward compounding and double-sign slashing. Harmony aims to build an open network of nodes operated and governed by a large community. This node community is called Pangaea.

  1. Mainnet
  2. Harmony Testnet
Chain nameharmony-mainnet
Chain ID1666600000
Block explorerhttps://explorer.harmony.one/
Blocktime2 seconds
Historical balances
NFT assets and metadata
Premium Endpoints
Premium Balances
Premium Transactions
Premium Log Events
Query via SQL on Increment

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Network Status

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Daily Active Wallets
Unique wallets who transact on a daily basis.
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Transactions
Unique transactions on a daily basis.
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Active Tokens
Unique tokens active on a daily basis.
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Powered by Increment.
Harmony mainnet had

Code Samples

  1. Token Balances
  2. Transaction History
  3. Portfolio
  4. Get a block

Get token balances for address

GET/v1/{chainName}/address/{walletAddress}/balances_v2
  1. shell
  2. JavaScript
  3. ruby
  4. python
Request
curl --request GET 
     --url https://api.covalenthq.com/v1/{chainName}/address/{walletAddress}/balances_v2 
     --header 'accept: application/json' 
     --header 'x-api-key: demo'